Sometimes due to routine maintenance of server/slow net connection/not good net connectivity/technical problem this problem facing by users....if you have good net connection and you are still sufferning from this problem then...

Try These simple steps...logout then....try to clear the cookies of your browserupdate your flash player..reloginif nothing happen then try to login with different browser..Firefox,IE,Safari are the best browsers for chesscube...Chrome have some technical problem in these days..